Adenosine is a natural chemical in your body that builds up ... But here’s the catch: drinking caffeine too early in the day might actually reduce its effectiveness later on.

Wondering if coffee or energy drinks are better for you? Discover their pros, cons, and the healthiest way to get your ...

But labels don't have to reveal how much caffeine the products pack. We will. We measured the amount in 27 top-selling energy drinks and shots (see table below). We bought the drinks online or at ...

David Benavides, a board-certified sleep medicine physician, told Newsweek when you should cut off coffee consumption and why ...

Too much caffeine can lead to dangerous side ... It can also be made synthetically and is added to some drinks, foods and medicines. The chemical "stimulates the brain and central nervous system ...